9311 allele of OsNAR2.2 enhances nitrate transport to improve rice yield and nitrogen use efficiency
文献类型： 外文期刊
第一作者： Hou, Linlin
作者： Hou, Linlin;Chen, Dongdong;Pan, Xiangjian;Jiang, Shenghang;Liu, Jiajia;Li, Qing;Liu, Yuanyuan;Tong, Yi;Zhu, Li;Hu, Jiang;Zhang, Guangheng;Dong, Guojun;Zhang, Qiang;Ren, Deyong;Shen, Lan;Guo, Longbiao;Qian, Qian;Gao, Zhenyu;Jiang, Shenghang;Zhang, Guangheng;Qian, Qian
作者机构：
关键词：
nitrate transport;
期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：10.5； 五年影响因子：12.4 ）
ISSN： 1467-7644
年卷期： 2025 年 23 卷 7 期
页码：
收录情况： SCI
摘要： Improving nitrogen use efficiency (NUE) in rice is a requirement for future sustainable agricultural production. However, key factors and regulatory networks involved in NUE remain unclear. Here, QTL analysis, fine-mapping and functional validation demonstrated that qCR4 encodes a putative high-affinity nitrate transporter-activating protein 2.2 (OsNAR2.2). Located in the endoplasmic reticulum (ER), OsNAR2.2 was confirmed to regulate nitrate transport from root-to-shoot and control panicle number, grain yield and NUE in rice. RNA-seq and RT-qPCR revealed that OsNAR2.2 modulates nitrogen utilization by altering the expressions of some nitrogen metabolism-related genes and auxin signal-related genes. Furthermore, the 9311 allele of OsNAR2.2 significantly enhanced panicle number, grain yield and NUE, which provides a potential target for rice yield and NUE improvement.
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